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Periodic Table

1 2 Group 3 4 5 6 7 0
Period
1 1
H Hydrogen 1
KEY 2
He Helium 4.0
2 3
Li
Lithium
7
4
Be
Beryllium
9
Atomic Number Symbol
Name
Relative atomic mass
5
B
Boron
10.8
6
C
Carbon
12.0
7
N
Nitrogen
14.0
8
O
Oxygen
16.0
9
F
Fluorine
19.0
10
Ne Neon 20.2
3 11
Na
Sodium
23
12
Mg
Magnesium 24
13
Al
Aluminium
27.0
14
Si
Silicon
28.1
15
P
Phosphrous
31.0
16
S
Sulphorus
32.1
17
Cl
Chlorine
35.5
18
Ar
Argon
39.9
4 19
K
Potassium
39
20
Ca
Calcium
40
21
Sc
Scandium
45
22
Ti
Titanium
47.9
23
V
Vanadium
50.9
24
Cr
Chromium
52.0
25
Mn
Manganese
54.9
26
Fe
Iron
55.9
27
Co
Cobalt
58.9
28
Ni
Nickel
58.7
29
Cu
Copper
63.5
30
Zn
Zinc
65.4
31
Ga
Gallium
69.7
32
Ge
Germanium
72,6
33
As
Arsenic
74.9
34
Se
Selenium
79.0
35
Br
Bromine
79.9
36
Kr
Krypton
83.8
5 37
Rb
Rubidium
85
38
Sr
Stronium
88
39
Y
Yitrium
88.9
40
Zr
Zirconium 91.2
41
Nb
Niobium
92.9
42
Mo
Molybdenum
95.9
43
Tc
Technetium
99
44
Ru
Ruthenium
101.1
45
Rh
Rhodium
102.9
46
Pd
Palladium
106.4
47
Ag
Silver
107.9
48
Cd
Cadmium
112.4
49
In
Indium
114.8
50
Sn
Tin
118.7
51
Sb
Antimony
121.8
52
Te
Tellurium
127.6
53
I
Iodine
126.9
54
Xe
Xenon

131.3
6 55
Cs
Caesium
133
56
Ba
Barium
137
57 *
La
Lanthanum
138.9
72
Hf
Hafnium
178.5
73
Ta
Tantalum
181.0
74
W
Tungsten
183.9
75
Re
Rhenium
186.2
76
Os
Osmium
190.2
77
Ir
iridium
192.2
78
Pt
Platinum
195.1
79
Au
Gold
197.0
80
Hg
Mercury
200.6
81
TI
Thallium
204.4
82
Pb
Lead
207.2
83
Bi
Bismuth
209.0
84
Po
Polonium
210
85
At
Astatine
210
86
Rn
Radon
222
7 87
Fr
Francium
223
88
Ra
Radium
226
89 * *
Ac
Actinium
227
104
Db
Dubnium
261
105
JI
Joliotium
262
106
Rf
Ruther-fordium 263
107
Bh
Bohrium
108
Hn
Hahaium
109
Mt
meiterium
Lantha-noid elements * 58
Ce
Cerium
140.1
59
Pr
Praseo-dymium
141
60
Nd
Neodymium
144.2
61
Pm
Promethium
147
62
Sm
Samarium
150.4
63
Eu
Europium
152.0
64
Gd
Gadolinium
157.3
65
Tb
Terbium
158.9
66
Dy
Dysprosium
162.5
67
Ho
Holmium
164.9
68
Er
Erbium
167.3
69
Tm
Thulium
168.9
70
Yb
Ytterbium
173.0
71
Lu
Lutetium
175.0
Actinoid elements ** 90
Th
Thorium
232.0
91
Pa
Protactinium
231
92
U
Uranium
238.1
93
Np
Neptunium
237
94
Pu
Plutonium
242
95
Am
Americium 243
96
Cm
Cunum
247
97
Bk
Berkelium 245
98
Cf
Califronium
251
99
Es
Einsteinium
254
100
Fm
Fermium
253
101
Md
Mendelevium 256
102
No
Nobelium 254
103
Lr
Lawrencium 257

Last Updated on 8/18/99
By Tony.H

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